Image widget -- add 2 extra mouse events

Say I had a world map. At the moment if I roll over a country it highlights, but I don't have access to that event. With these new events you could roll over a country and have a label popup with infomation about the country and disappear when it rolls out. This then frees up the 'On Area Click' to be used for navigation or something else.

This would make this widget way more interactive and really open it up for some great things.